Effect of Dispersant on Preparation of Barium Strontium Titanate Nanopowders by Microwave Hydrothermal Processing

Abstract:

Through the microwave-hydrothermal processing at 70 °C in 10 min, barium strontium titanate (BST) nanopowders are prepared by using butyl-titanate, barium nitrate and strontium nitrate as raw materials. Two kinds of dispersants namely polyethylene glycol 6000 and OP-10 are added, respectively. The dispersant mechanism and dosage on the crystal phase and microstructure are studied by X-ray diffraction (XRD), fourier transform infrared spectroscopy (FTIR), transmission electron microscopy (TEM). The results show that the dispersive effect of OP-10 is better than the polyethylene glycol 6000. The long chain of OP-10 can be used to disperse nanopowders through a space steric hindrance mechanism, well-dispersed BST nanopowders are obtained when mass percent ratio of dispersant (OP-10) is 5%.

• Periodical: Materials Science Forum (Volume 852)
• Pages: 362-368
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.852.362
• Online since: April 2016
• Authors: Jie Chen, Ming Chao Che, Feng Yan
• Keywords: Barium Strontium Titanate, Dispersity, OP-10, Polyethylene Glycol 6000

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